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The macroblock is a processing unit in image and video compression formats based on linear block transforms, typically the discrete cosine transform (DCT). A macroblock typically consists of 16×16 samples, and is further subdivided into transform blocks, and may be further subdivided into prediction blocks. Formats which are based on macroblocks include JPEG, where they are called MCU blocks, H.261, MPEG-1 Part 2, H.262/MPEG-2 Part 2, H.263, MPEG-4 Part 2, and H.264/MPEG-4 AVC.[1][2][3][4] In H.265/HEVC, the macroblock as a basic processing unit has been replaced by the coding tree unit.[5]
- ^ ITU-T (March 1993). "Video codec for audiovisual services at p x 64 kbit/s". Retrieved 2013-04-28.
- ^ ITU-T (February 2012). "Advanced video coding for generic audiovisual services". Retrieved 2013-04-28.
- ^ ITU-T (January 2005). "Video coding for low bit rate communication". Retrieved 2013-04-28.
- ^ ITU-T (April 2013). "Information technology — Generic coding of moving pictures and associated audio information: Video". Retrieved 2013-04-28.
- ^ G.J. Sullivan; J.-R. Ohm; W.-J. Han; T. Wiegand (2012-05-25). "Overview of the High Efficiency Video Coding (HEVC) Standard" (PDF). IEEE Transactions on Circuits and Systems for Video Technology. Retrieved 2013-04-26.